Finding the Fourth Proportional to 1,031.15, 1,423.04 and 588.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.15 : 1,423.04 = 588.89 : x
2. Step 2: Convert to fraction form
   1,031.15/1,423.04 = 588.89/x
3. Step 3: Cross multiply
   1,031.15x = 1,423.04 × 588.89
4. Step 4: Simplify right side
   1,031.15x = 838,014.64
5. Step 5: Solve for x
   x = 838,014.64/1,031.15
6. Step 6: Final answer
   x = 812.70